Pipe-tongs.



PATENTED DEG. 24,1902.

H. H..MADDREN.

PIPE TONGS.

APPLICATION FILED MAY 13,1907.

2 SHEETSSHEET 1.

Fi .E.

/ I I A attozwu N0. 874,854. w PATENTED DEC. 24, 1907.

' H. H. MADDRENL PIPE TONGS.

APPLICATION FILED MAY 13, 1907.

2 SHEETS-SHEET 2.

HAROLD H. MADDREN, or HOLLYWOOD, CALIFORNIA.

Pipe-Tones.

Specification of Letters Patent.

Patented Dec. 24, 1907.

1 Application filed May 13.1907. Serial No. 373,446.

To all whom it may concern: v

Be it known that I, HAROLD H. ll/IADDREN, a citizen of the United States, residing at Hollywood, in the county of Los Angeles, Stateof California, have invented certain new and useful Improvements in Pipe- Tongs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new anduseful improvements in' pipe tongs for use in con nection with the tubes orcasings of Artesian and. oil wells, and it has particular reference to a device of this character embodying a lever and pipe gripping members suspended therefrom, and designed uponmoveinent of the lever in one direction to frictionally engage the pipe and upon movement in an opposite direction to release the same.

In connection with a device of the above type the invention aims as a primary object to provide a novel construction, combination, and arrangement of parts, the details of which will appear in the course of the following-description, in which reference is had to the accompanying drawings, forming a part of this specification, like characters of reference designating similar parts throughout the several views wherein:

Figure 1 is a side elevation showing the manner of use of a device constructed in accord ance with the present invention, the disengaged position of '13: frictional gripping element being indicated by dotted lines. Fig. 2 is the section on the line 2-2 of Fig. 1. Fig. 3 is a detailed perspective view of the frictional gripping element. Fig. 4 is a side elevation illustrating the manner of use of a slightly, modified embodiment of the inventlon.

Referring speclfically to theaccompanying drawings, the numeral 1 designates a .memberwhich isi'ormed at its upper end with s aced ears 2 and at its lower end with space ears Projecting forwardly from the member 1, are spaced parallel jaws 4, havin curved lower surfaces. 5, formed to partia ly. surround a'pipe 6. The jaws {tat theirouter ends are formed with extended apertured' ears 7. A curved link 9 is ar-. ranged in op osition to the jaws 5 and co-' acts therewit'igto surround the pipe With this .object in viewthe" link 9 is pivoted by a pin 10 between the-ears 3 andits free endis detachably engaged by means of a in 11 between the ears 7, the said free end eing provided for this purpose with an aperture 12.

The tongs are manipulated by a lever 13 having a bifurcated'end 14. Said lever at a distance from its end 14, is pivoted by means of a pin 15 between the ears 2.

The grip ing member is designated gen erally by tie numeral 16 and comprises a block 17 having a curved widened face 18 and a reduced portion 19, formed with an opening 20. The reduced portion 19 is pivotally engaged between the bifurcations of the end 14 by means of a pin 21. Gripping dies 22 a e countersunk into the 'curved face 18, and have their sharpened corner portions projecting therebeyond, said gripping dies being preferably rectangular in cross section and transversely disposed.

- In use, the device may be operated manually or by power, and the lever 13 upon its,

initial movement in the direction indicated by the arrow in Fig. 1 will move the member 16 to frictionally grip the pipe. Continued movement of said lever in the same direction moves the entire structure together with the pipe about the axis of the latter. of the lever 13 in an o posite direction disengages the member 16 om the pipe and resets the tongs for further operation in the manner above described.

In the modified embodiment of the invention illustrated in Fig. 4, the same is employed in connection with a pipe of reduced size. To this end, a member 16 of increased depth is employed conjunctively with a curved bushing 23 interposed between the link 9 and the pipe.

The device embodied in the present invention is simple in construction, inexpensive to Movement manufacture and practical and efiicientirn From the foregoing description it will be seen that simple and ellicientmeans are providedfor accomplishing the objects of the invention, but whiie the elements herein shown and described are well adapted 'to" serve the functions set forth it is obvious that various. minor changes maybe made in the proportions, shape and arrangement of the several parts, Without departing from. the spirit and scop'e'ofthe invention asdefined in the'appended claims. What is claimed is.

Adeviee'of'the type set forth, co'mpri'singia" lever, having a bifurcated enrL a member prvE 'to said member, and designed tehi've its other end detaehebiy engaged with the ends ally suspended from sin I: Q eweee said member being formed with awide curved 10 from sai bifurcated end and having forface having gripping dies embedded therein. Wardly projecting jaws formed With curved i In testimony whereof, I efiix my signature, lower faces, e curved link pivoted a} one end in presence of two Witnesses.

HAROLD n. MADDREN.

Witnesses GEORGE BUGBEE, WM. G. ROBERTS.

otelly sus ended from said lever at a distance of said jaws, and a gripfing member pivotbifurcated end end disposed for movement between said aws, 

